Hi. My upper EDU center fuel quantity displays 'CONFIG' in yellow. I had turned off the center fuel pumps at 1.00 as required and this happens. Not on every flight, but on some it does this. I looked thru the documentation and didn't find it although a search doesn't always find every single thing.

What does this yellow 'config' mean?

I can't help you other than to refer you to pages 12.10.7 and 12.10.8 of the FCOMv2, and page 12.1 of the Quick Reference Handbook.